Make sure u have pear install ( ’sudo apt-get install php-pear’ )
Then run: sudo apt-get install imagemagick
And then: sudo pecl install imagick
**if you get an error which looks like this: configure: error: Cannot locate configuration program Wand-config then no problem, simply run the following command: sudo apt-get install libmagick9-dev
Now re-run sudo pecl install imagick
Add extension=imagick.so to your php.ini ,restart server and all ok.